Watch out for the temperature range and the blue ones have a lot of glare. The green one in post seems like a good one.
For different sizes you will have to customize the code, it isn't terribly hard if you know something about those things. But if you don't want to do deal with the programming you can just daisy chain guinos together with a simple "Y" adapter:
http://ecomodder.com/forum/showthrea...html#post47387
Just set them up with the same parameters.
